ASTM E647-13a
Standard Test Method for Measurement of Fatigue Crack Growth Rates

Standard No.

ASTM E647-13a

Release Date

2013

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM E647-13ae1

Latest

ASTM E647-23b

Scope

5.1 Fatigue crack growth rate expressed as a function of crack-tip stress-intensity factor range, d a/dN versus ΔK, characterizes a material's resistance to stable crack extension under cyclic loading. Background information on the ration-ale for employing linear elastic fracture mechanics to analyze fatigue crack growth rate data is given in Refs (1)⁵ and (2).

5.1.1 In innocuous (inert) environments fatigue crack growth rates are primarily a function of ΔK and force ratio, R, or K _max and R (Note 1). Temperature and aggressive environments can significantly affect da/ dN versus ΔK, and in many cases accentuate R-effects and introduce effects of other loading variables such as cycle frequency and waveform. Attention needs to be given to the proper selection and control of these variables in research studies and in the generation of design data.

Note 1—ΔK, K_max, and R are not independent of each other. Specification of any two of these variables is sufficient to define the loading condition. It is customary to specify one of the stress-intensity parameters (ΔK or K_max) along with the force ratio, R.

5.1.2 Expressing da/dN as a function of ΔK provides results that are independent of planar geometry, thus enabling exchange and comparison of data obtained from a variety of specimen configurations and loading conditions. Moreover, this feature enables d a/dN versus ΔK data to be utilized in the design and evaluation of engineering structures. The concept of similitude is assumed, which implies that cracks of differing lengths subjected to the same nominal ΔK will advance by equal increments of crack extension per cycle.

5.1.3 Fatigue crack growth rate data are not always geometry-independent in the strict sense since thickness effects sometimes occur. However, data on the influence of thickness on fatigue crack growth rate are mixed. Fat......

ASTM E647-13a history

• 2023 ASTM E647-23b Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2023 ASTM E647-23a Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2023 ASTM E647-23 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2022 ASTM E647-22b Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2022 ASTM E647-22a Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2022 ASTM E647-22 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2015 ASTM E647-15e1 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2015 ASTM E647-15 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2013 ASTM E647-13ae1 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2013 ASTM E647-13a Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2013 ASTM E647-13e1 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2013 ASTM E647-13 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2012 ASTM E647-12 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2011 ASTM E647-11e1 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2011 ASTM E647-11 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2008 ASTM E647-08e1 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2008 ASTM E647-08 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2005 ASTM E647-05 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 2000 ASTM E647-00 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 1999 ASTM E647-99 Standard Test Method for Measurement of Fatigue Crack Growth Rates
• 1995 ASTM E647-95 Standard Test Method for Measurement of Fatigue Crack Growth Rates